Dry screw vacuum pump
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What is the purpose of installing one-inch nitrogen lines at the inlet and outlet of a dry screw vacuum pump? Is it for something similar to a gas lock valve, a gas barrier seal, or for purging purposes?
Whether to use nitrogen depends on the properties of the medium; if the gas is an organic solvent, nitrogen is used for purging
Regardless of the solvent used, I believe nitrogen sealing is an essential standard feature. Many manufacturers do not use nitrogen sealing, or they provide it only at one end of the drive side and the non-drive side; it is best to have nitrogen sealing at both ends in order to prevent gases or solvents from entering and damaging the seals and bearings, thus extending their service life.